Microsoft, who has denied being involved with Prism since the program was first divulged, released a statement this week saying it did not provide the NSA with a backdoor to access personal Outlook.com e-mails and Skype conversations.

To provide real-time information on newly discovered threats, Microsoft this week launched its Cyber Threat Intelligence Program (C-TIP), a program that will alert ISPs and emergency response teams of newly infected systems.